Height: 117.5 mm Leaf Width: 28.6 mm Leaf Depth: 40.5 mm features: Soss 218 solid stainless steel hinge For door thickness 41-45 mm Suitable for 1 Hour fire rated doors Passed 1 hr fire test carried out by Chiltern Fire research station in accordance with BS476 : PT22 : 1987 section 6 Min. 3 hinges per door leaf Solid stainless steel hinge and links Fixing screws included When fitting 3 hinges the centre hinge should be located one-half the distance from the horizontal cenre line of the door to the centre line of the top hinge. Example. A door 760 mm wide that weighs 50 kg and is 44 mm thick would require 3 No Soss 218 hinges